String index out of bounds? (Java, substring loop)

Question

This program I\'m making for a COSC course isn\'t compiling right, I keep getting the error:

Exception in thread \"main\" java.lang.StringIndexOutOfBoundsException:

Answer 1

You may need to take out the = in the line

while (count <= input.length() ) {

and make it

while (count < input.length() ) {

because it is causing the substring to read beyond the length of the string.

=============== But I'll add a few extra bits of advice even though its not asked for:

do not use == to compare strings, use

letter.equals("a")

instead. Or even better, try using

char c = input.charAt(count);

to get the current character then compare like this:

c == 'a'